package lab02.Test36;

public class Postgraduate extends Student{
    @Override
    String calGrade() {

        double avg=calAverage();

        if(avg >=90 && avg <=100)
            grade= "优秀";
        else if(avg >=80 && avg<90)
            grade="良好";
        else if(avg >=70 && avg<800)
            grade="一般";
        else if(avg >=60 && avg<70)
            grade="及格";
        else
            grade = "不及格";
        return grade;

    }
}
